Is there a way to find the rectangle of the current camera view? I'm aware of .position and .positionCartographic, however I need full left/right/top/bottom or top/left/width/height information that I can use to make a rectangle with either Cesium.Rectangle() or Cesium.Rectangle.fromDegrees()
My goal here is to use this information to draw an image onto the map.
url : url,
rectangle : Cesium.Rectangle.fromDegrees(x, x, x, x)